1. State Key Laboratory of Fine Chemicals, DUT-KTH-Joint Education and Research Center on Molecular Devices, Dalian University of Technology (DUT), Zhongshan Road 158-40, 116012 Dalian, China
2. Department of Chemistry, Dalian University of Technology (DUT), 116024 Dalian, China
3. Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm, Sweden
4. School of Chemical Science and Engineering, Department of Chemistry, Organic Chemistry, Royal Institute of Technology(KTH), 10044 Stockholm, Sweden